(Table S1) Diatom abundance in coastal upwelling systems


Coastal upwelling systems account for approximately half of global ocean primary production and contribute disproportionately to biologically driven carbon sequestration. Diatoms, silica-precipitating microalgae, constitute the dominant phytoplankton in these productive regions, and their abundance and assemblage composition in the sedimentary record is considered one of the best proxies for primary production. The study of the sedimentary diatom abundance (SDA) and total organic carbon content (TOC) in the five most important coastal upwelling systems of the modern ocean (Iberia-Canary, Benguela, Peru-Humboldt, California and Somalia-Oman) reveals a global-scale positive relationship between diatom production and organic carbon burial. The analysis of SDA in conjunction with environmental variables of coastal upwelling systems such as upwelling strength, satellite-derived net primary production and surface water nutrient concentrations shows different relations between SDA and primary production on the regional scale. At the global-scale, SDA appears modulated by the capacity of diatoms to take up silicic acid, which ultimately sets an upper limit to global export production in these ocean regions.

Supplement to: Abrantes, Fatima F; Cermeño, Pedro; Lopes, Cristina; Romero, Oscar E; Matos, Lelia; van Iperen, J; Rufino, Marta M; Magalhães, Vitor H (2016): Diatoms Si uptake capacity drives carbon export in coastal upwelling systems. Biogeosciences, 13(14), 4099-4109

DOI https://doi.org/10.1594/PANGAEA.859881
Related Identifier IsSupplementTo https://doi.org/10.5194/bg-13-4099-2016
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.859881
Creator Abrantes, Fatima F ORCID logo
Publisher PANGAEA
Publication Year 2016
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 2232 data points
Discipline Earth System Research
Spatial Coverage (-132.667W, -50.650S, 61.685E, 49.400N); Indian Ocean; Arabian Sea; South Pacific Ocean; off Kunene; Walvis Ridge; Namibia Continental Margin; Namibia continental slope; Angola Diapir Field; Angola Benguela Front; South-East Pacific; Southern Cape Basin; Northern Cape Basin; Agadir Canyon; Canary Islands; off Gabun; southern Congo fan; off Angola; off Chile; Walvis Bay/Namibia; off Northwest Africa; Mauritania Canyon; Porto Seamount; Marge Ibérique; Eastern Equatorial Pacific; off Portugal; North Atlantic; Peru Continental Margin; Pacific
Temporal Coverage Begin 1967-06-01T00:00:00Z
Temporal Coverage End 2006-09-02T11:14:00Z